How to search for words/phrases (within titles, abstracts, etc):

Return records containing words higgs and
boson.

Return records containing phrase 'higgs boson' in
title.

Return records entitled exactly "Higgs boson" but not
records such as "Overview of Higgs boson
production".(Note: For some indexes such as any
field, title, or abstract, there is no
distinction between searching for double quoted and single quoted
expressions. Both behave the same usual way.)